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03-07-2022 06:10 PM
I posted previously about persistent jams at the registration assembly in a 9050dn. I'm about as certain as I can be that it's not a mechanical issue in the registration assembly. I've cleaned the clutches and tested them in and out of the reg assembly with a DC power supply. They work when the printer is starting up and when clearing the paper path after a jam, but do not engage when running a print job.
Running a service test displays: "1429,0000,0000,0000" There's no 1429 code listed in my service manual, can't find anything online.
The Event Log page (in addition to the jam codes) reads: "88 0E29 FailCode from Engine Self-Test Execution" I can't find anything on that either.
Does anyone have any idea what these codes are?
Or have any idea what may be preventing the activation of the clutches?
03-17-2022 02:33 PM
If the clutches are working during startup, I would recommend that you perform a cold reset on the printer. I have found cases where the brains just get scrambled and need to basically start over.
I am a volunteer, offering my knowledge to support fellow users, I do not work for HP nor speak for HP.
03-18-2022 05:52 PM
Thanks for the reply.
After my previous post I tried a cold reset, with no change to the problem. I just tried again, and also reinitialized the NVRAM. Again, no change.
I found DC controller boards for sale (only $30 with shipping, refurbished, whatever that means) on ebay. Am I correct in assuming this is where the sequencing logic for the mechanics of the printer resides? Does replacing the DC controller seem like a logical next step?
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